Type-writing machine.



A. G. F. KUROWSKI. TYPE WRITING MACHINE. APPLICATION FILED JULY 23. 1910.

Patented June 1, 1915.

Ana FFKQE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR '10 UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A. CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed July 23, 1910. Serial No. 573,407.

which the following is a specification.

This invention relates to paper feeding devices for typewriting machines, and particularly to means whereby envelope, bill heads or other work sheets are fed or moved in line-spacing direction at one operation through a greater distance than is obtainable by the use of the'regular line-spacing mechanism, to bring the first printing line thereon to the printing point of the machine.

According to the invention, by swinging a driver or crank, a pawl connected thereto is caused to drive a ratchet that is fast upon a comparatively large gear, said gear mesh ing with a comparatively small pinion, the latter being secured to the axle of the platen, whereby the platen is rotated through a longer arc than is traversed by the crank or driver. The platen has the usual line-space mechanism including a notched linespace wheel engaged by a detent.

To facilitate the turning of the platen and reduce the noise of operation, the usual spring dctcnt engaging the line-s ace wheel is silenced during the initial or driving stroke of the crank or lever, by a cam levcr rocked by a cam controlled by the crank. The dctent is caused to rescat itself directly in a notch in the line-space wheel, without turning the latter, when the platen is arrested at the end of its rotation.

In the accompanying" l'.n\\ings, Figure 1 is a perspective view. showing: one form of the invention applied to the platen frame of an Underwood writing: machine. Fig. 2 is a side view, partly l rolccn away. Fig. 3 is a similar view, parts being rcnuwed, the driiing lcver being in normal position. Fig. 4- shows the driving lcv r partly advanced, and the pawl in engag. art with the ratchet. Fig. 5 shows the positions of the parts at the end of the initial stroke of the dri ing lever. Fig. 6 is an edge view, partly i section.

The. usual platen 1 is mounted on an axle 2 journaled in platen frame ends 3, and manually rotated to an'unlimited extent f0rwardly or backwardly by finger wheels 4 on said axle. The platen may also be rotatedforwardly by the usual line space mechanism, comprising a lever 5 pivoted to the main carriage at 6 to operate a slide 7 having a pawl 8 to engage a notch line-space wheel 9 fast on the platen axle 2. A springpresscd detent 10 engages said line-space wheel, and is releasable by a cam lever 10 hung on the axle 2, as usual. 1

The gross line-spacing mechanism is mounted preferably at the same platen end with the regular line-space mechanism, and comprises a driving lever or crank 11 journalcd on a stud 12 mounted on the platen frame end 3, to turn the platen, and swinging in an are above the platen, to he operable at any point in the tra el of the car iage without obstruction by other parts of the machine. The lever is normally held by a returning spring 18 against a rest 17.

The initial or driving stroke of the lever or crank 11 from its position in Figs. 2 and 3, in the direction of the arrow, first causes a awl 13. pivoted to the lever at 13 to ride ofi a switch or trip 20. whereupon the spring 18 acts to effect the immediate engagement of the pawl with a ratchet M (Fig. 4). Said trip 90 lies substantially concentric with ratchet 1-1. and supports the pawl out of contact with the ratchet. to enable the platen 1 to he turned freely in either direction in dependently of the sross line-spacing mechanism. Continued forward movement of the lever 11. rotates the ratchet to turn a gear 15 fast therewith, said ,q'ear being joui'naled on the stud l2 and meshing with a smaller pinion 16, the latter fast on the axle of the platen, to turn the latter. The platen is thus advanced a great distance and until arrested by the engemcnt of the pawl with a. stop 21, (Fig.

Owing to the relative sizes of the gear and pinion. a partial rotation of the ratchet and gea will turn the platen through a comparatively longs, arc, to advance the first writing line of th work sheet to the printin"; point. Said stop projects from an arm 25., preferably secured to the stud 12, the stop being entered in any of a series of apertur s 23 formed in the platen frame end 3 and constituting a rack which may be concentric with the ratchet, to enable the stop to be adjusted toward and from the switch or trip' 20, to vary the throw of the driver and hence of the platen, whereby envelope and work sheets having different widths of topmarg ns may be advanced to bring the first line thereon to the printing point. Said adjustment is obtained by removing the tastening screw 24;. which secures the arm in place on the stud. adjusting the stop, and replacing the screw. I

' The pawl may have a lateral abutment 25 to engage the stop" 21 at a. point close to the support of the latter. to avoid straining the stop in case the driving lever 11 is forcibly operated. The abutment 25 and the stop 21 cooperate to lock the ratchet wheel 1-4 and the platen against overthrow, as will he un derstood from Fig.

The hub 26 of said driving lever has a. cam 27, which. when the driving lever is swung on its initial stroke. engages one end ofa dctent-relcasing lever 28 pi oted at 29 (and prefera'ly having an anti'friction roller 31 to run on the cam) to rock the later and cause a cam 30 (at its opposite end) to crowd against a pin on the. detent 10. to release the latter from the line space wheel 9. This is done at the first portion otthe initial stroke of the cranlc 1]. It will be seen that the cam 27 has a long dv ell portion concen ric with axle 12, which mainta ns the detent in inoperativet-position d ring the turning of the platen by the dri er. and e im nates the cl cking noise that would b caused by the detent running over the teeth of the line-s 'iace wheel. Upon the release of the handle or driver. (Fig. the spr ng 18 returns it to normal position '(Fig. l). the pawl 13 mo ing idlv over the ratchet l-l and finally riding upon the trip or switch 20 out o't contact therewith. Said return ng sp ing may be coiled about the st d l2 and rotected from injury by a shie d 19. The return movement of the hand e ll also releases the ocking lever 28 i i-om the hub cam 27. whereupon the detent 1O snaps into one of the notches oi the linespace wheel.

The rotation of the platen and line-space wheel hv the driver may be so controlled that. when the platen is arrested. a notch of the line-space wheel will register with the de ent. The ratio between the pitch of the teeth on the line-space wheel 9 and. that of ratchet 14- con forms to the ratio between the pitches ot' teeth on the pinion l6 and driving gear 15. Thus. it the ratio between the gear and pinion is. as three to one, then the ratchet- -14 has three times as many teeth as wheel 9. and hence the rotation of the crank 11 through one-third of the revolution would turn. theplaten through a full revolution. The stop 21 is located at a point to arrest the platen when detent 10 regis ters with a notch in wheel 9; and the open-' placed at intervals to agree ings 23 may be with the p tch of teeth of ratchet 14, as shown a clotted circles at Fig. 3.

if there are thirty-three teeth on the linespace wheel and eleven teeth on the pinion 16, the gear will have thirty-three teeth, and there will be ninety-nine teeth on the ratchet. The advance of the ratchet through a space equal to one tooth, therefore, will turn the line-space wheel 9 through one whole tooth space.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without'others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen, and a line-space Wheel and detent therefor, of a gross line-spacing n1 clrn1.isin including a train of gears connected with the platen, a pivotally supported crank having a pawl which, when the crank is rocked in one direction, operates the train of gears to advance the platen, means connected to said crank for releasing the detent, and means to lock the platen against overthrow when operated by said :ranlr.

In a tvpewriting machine, the combination with a platen and a regular line space mechanism therefor, of an auxiliary platen turning mechanism including a train of gears, one of which is connected with the platen. a pivotally supported driving mechanism to turn another of said gears to r0- tate the platen. in one direction, and a switch engaged bv the driving mechanism on its return stroke to hold it disengaged from the gear to permit the platen to be turned independently thereof in eitherdirection.

3. In a typewriting machine. the combination with a platen, a regular line-space mechanism including a notched line-space wheel, and a detent for said wheel, of an auxiliary platen turning mechanism includmg a train of gears, one of which is connected to the platen, a pivotally-supported driver to operate the gears to ,turn the platen in one direction. a releasing lever operated by the driving mechanism to -render the line-space wheel de cnt idle during the rota tion of the platen when driven through the gearing. means to return thedriving mechanism to original position. to enable the engagement of the detent with its line-space wheel. and a switch effective to hold the driving mechanism disengaged from the gearing to enable the platen to be turned in either direction independently thereof.

4. In a typewritingmachine, the combination with a platen, a regular line-space mechanism including a notched line-space wheel. and a-detent for said Wheel, of an auxiliary platen turning mechanism comprising a pinionconnected with the platen, a gear meshing with the pinion, a driving mechanism to opetate the gear to turn the platen, and having 'a cam, a cam lever rocked by the cam when the driving meehanism is operated in one direction, to disengage and ,hold the detent in idle position, and a switch normally maintaining the driving mechanism disconnected from the gear to enable the platen to be turned in either direction independently thereof.

In a typewriting machine, the combination with a platen frame, a platen, and aregular line-space mechanism therefor. of a pinion connected with the platen, a gear journaled on the platen frame and meshing with the pinion, a pivotally supported finger lever having a pawl, a ratchet turning with the gear and engaged by the pawl to turn the platen when the finger lever is swung in one direction. a stop in the path of the pawl and an offset abutment on the pawl to en gage the stop near its point of support to avoid straining the stop, and means to disengage the pawl from operative position.

6. In a typewriting machine. the combination with a platen frame. a platen, and a regular line-space mechanism therefor, of a pinion connected with the platen. a gear journaled on the platen frame and me hing with the pinion. a pivotally supported finger lever having a pawl. a ratchet turning with the gear and engaged by the pawl to turn the platen when the finger lever is swungin one direction. a spring to cause the pawl to bite the ratchet and to return the. finger lever to original position. and a switch over which thepawl rides on tlie'return of the finger lever to disconnect the pawl from its ratchet.

7. In a typewriting machine. the coml.)ination with a platen frame. a platen. regular line-space mechanism. including. a notched line-space wheel. and a detent engaging; the wheel, of a pinion connected with the platen. a gear journalcd on a stub shaft supported bv the platen frame and moshing-with the pinion. a driving lever havine a hub pivoted on the shaft. a pawl on the dri ing lever to turn the gear and rotate the platen. a cam lever pi voted on thcplaten frame. a cam on the hub of the driving lever effective to rock the cam lever and cause it to disconnect the detent from the line-space wheel while the platen is being turned by the driving lever. means to return the driving lever to normal position. and a switch to hold the pawl in idle position.

8. in a typewriting machine. the combination with a platen having regular linespace mechanism including a toothed linespace wheel. and a detent therefor. ot a pinion connected to turn with the platen. a multiplying gear in mesh with the pinion, a ratchet turning with the multiplying gear. the ratio existing between the teeth of the multiplying gear and the teeth of the pinion controlling the ratio between the teeth of the ratchetand the teeth of the line-space wheel, and a driving mechanism including a pawl to engage the teeth of the ratchet to turn the platen through a comparatively long are of movement by acomparatively short throw of the driving mechanism.

9. In a typewriting machine, the combination with a platen rotatable in a platen frame, and line-space mechanism including a line-space wheel, and a detent therefor, of a pinion connected to turn with the platen, a gear journaled on the platen frame and meshing with the pinion, a ratchet turning with the gear, a driving, lever having a hub loosely journaled concentric withthe axis ottlie gear, stops to arrest the throw of the driving lever in opposite directions, a pawl on the driving lever to engage the ratchet when the lever is swung in one direction. to turn the platen, an abutment projecting laterally from the pawl to strike one of said stops at a point near the platen frame at the end of the initial throw of the lever to pre i 11; straining the stop, a switch engaged by the pawl on the return of the lever, to disengage the pawl from the ratchet and hold it incited. tive, to enable the platen to. be rotated in either direction independently thereof, a cam on the hub of the driving lever, a pivotally supported cam lever, one end of which is operated by the cam hub to rock the other end of the lever to release the detent from' the wheel and hold it ineffective during the initial stroke of the finger lever.

10. In a typewriting machine, the combination with a rotatable platen, line-space meclnmism including a line-space wheel to turn the platen, and a detent for the linespace wheel, of a driver or crank to turn the platen more than a line-space and throw the detent to inoperative position.

11. In a typewriting n'lachine, the combination with a rotatable platen. line-space mechanism including a linc-space wheel to turn the platen. and a detent for the linespace wheel, of a driver or crank to turn the platen and throw the detent to inoperati e position, a ratchet turned by the crank. and

gearing interposed between and connecting the ratchet and platen to transmit the mo tion of the crank thereto.

12. In a typewriting machine. the c mbination with a platen having a regular line-space mechanism, of an auxiliary meclr anism including a driving lever, the initial throw of which in one direction causes a spring pressed pawl carried thereby to engage a ratchet to turn a gear in mesh with a pinion turning with the platen until the lever is arrested by a stop, a cam on the driving lever operating to rock a cam lever to disengage a detent from the line-space wheel while the platen is being turned, said lever being returned to original position' the pawl riding idly over the ratchet and lli all

finally being shifted out ofcontact therewith by a switch to enable the platen to be turned in either direction independently of said auxiliary mechanism.

13. In a typewriting machine provided with a platen and a line-spacing mechanism, including a line-space wheel and a spring detent therefor, the combination of a lever, means connected to said lever for advancing the platen at one stroke through many linespaces, and means controlled by said lever for releasing said detentfrom said linespace wheel.

14. In a typewriting machine provided with a platen and a line-spacing mechanism, including a line-space wheel and a spring detent therefor, the combination of a lever, means connected to said lever for advancing the platen at one stroke through many line-spaces, means controlled by said lever for releasing said detent from said line-space wheel, said releasing means ineluding a cam connected to said lever, and a connection from said cam to said detent.

15. In a typewriting machine prpvided with a platen and a line-spacing n1echanism, including a line-space wheel and a spring detent therefor, the combination of a lever, means connected to said lever for advancing the platen at one stroke through many line-spaces, said lever having a cam, and means controlled by said cam for releasing said detent from said line-space wheel, said cam provided with a dwell portion to hold the detent out of use during the operation of the lever. 16. In a typcwriting machine provided "with a platen nism, including a line-space wheel and a spring detent therefor, the ccombinati on of a lever, means connected to said lever for advancing the platen at one stroke through many line-spaces, means controlled by said lever for releasing said detent from said line-space wheel, said releasing means including a cam connected to said lever, and a lever intervening between said cam and said detent to be operated by the former to release the latter. I

17. In a typewriting machine, the combination with a rotatable platen, a line-space mechanism including a line-space wheel to turn the platen, and a detent for the line space Wheel, of a driver or crank to turn the platen at one stroke through many line and a line-spacing meeha-- spaces, and concomitantly throw said detent to an inoperative position.

18. In a typewritmg machine, the combination with a rotatable platen, of a linespace mechanism for said platen, a detent for said platen, and a line-space mechani in supplementing said first-mentioned l nespace mechanism, and acting by a single stroke to concomitantly throw said plat n at least one "all line-space, and render said detent inetlective.

19. In a typewriting machine, the combination with a rotatable platen, of a linespace mechanism for said platen, a second linespace mechanism for said platen, a detent for said platen detached from and capable of movement independent of said second-mentioned line-space mechanism, said secondmentioned linespace mechanism acting to concomitantly turn said platen and render said detent ineflcctive.

520. In a typewriting machine, the combination with a platen, of a normal line-space mechanism for said platen, an extraordinary line-space mechanism for said platen, in

cluding a toothed wheel connected to rotate said platen, a lever and a pawl mounted on said lever arranged to engage said wheel to rotatesaid platen, a detent for saidplaten normally free from and acting independent of said lever when said lever is inactive, and cam means brought in plav at the actuation of said lever, to force said detent to an ineffective or silent position.

21. In a typewriting machine, the combination with a platen, of a normal line-space mechanism for said platen, an extraordinary line-space mechanism for said platen, in? eluding a toothed wheel connected to rotate said platen, a lever, a pawl mounted on said lever arranged to engage said wheel to 1'0 tate said platen, and a switch for holding said pawl out of engagement with said wheel when said lever is in its inactive position, a detent for said platen normally free from and acting independent of said lever when said lever is. inactive, and cam means brought in play at the actuation of said lever to force said detent to an' inefi'ective or silent position.

ALFRED G. F. KUROVVSKI; 

